Error downloading update file

If you receive the message "error downloading update file" while updating the virus signature database, it may be due to one or more of the following reasons:
  • Interruption or loss of Internet connection
  • Data corruption on local drive
  • Damaged ESET installation
  • Corrupted update server files (Mirror server environment)
  • Incompatible update files (using beta ESET product to download from live update server)
To resolve this error, perform the following steps:
  1. Verify that your Internet connection is active by visiting ESET's home page.
  2. Clear update cache by performing the following steps:
    1. Open the main program window by clicking the ESET icon next to the system clock or by clicking Start - All Programs - ESET - ESET Smart Security or ESET NOD32 Antivirus.
    2. Press F5 to open the Advanced Setup window.
    3. From the Advanced Setup tree, click Update. Then, clear the update cache by clicking Clear....
    4. Click OK and restart your computer.
    5. Open the main program window and click Update - Update virus signature database.
    6. If you still receive the "Virus signature database update failed" message, continue to step 3. If not, you are finished.
  3. Delete the %AllUsersProfile%\Application data\ESET\ESET NOD32 Antivirus\Updfiles folder and Charon folders.
  4. ESET Smart Security: Click Start - My Computer and navigate to C:\Program Files\ESET\ESET Smart Security.

    ESET NOD32 Antivirus: Click Start - My Computer and navigate to C:\Program Files\ESET\ESET NOD32 Antivirus.
  5. Delete all em0**_32.dat files.
  6. Restart your computer.
  7. Open the main program window by clicking the ESET icon next to the system clock or by clicking Start - All Programs - ESET - ESET Smart Security or ESET NOD32 Antivirus.
  8. Click Update from the main menu and click Update virus signature database. If you still receive the "error downloading update file" message, continue to step 9. If not, you are finished.
  9. If the steps above do not resolve the "error downloading update file" message, please Uninstall, restart the computer (IMPORTANT!) and reinstall your ESET security product.